M90 camouflage is the camouflage pattern for the uniform system 90, used by the Swedish Armed Forces. In addition to the standard pattern, desert and jungle variants have been developed for the international missions. The M90 pattern employs basically a downscaled pattern of what has been used on aircraft and vehicles since the late 1970s, called the FOA camouflage, consisting of hard lined geometric shapes in order to create a camouflage pattern effective in the temperate forests and plains of Sweden. The M90 camouflage comprises four colors: dark green, light green, dark navy blue/black and beige (instead of the brown color in the FOA camouflage). Navy blue was chosen instead of black because natural shadows generally tend to be in shades of blue to the human eye.